/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package acciones;

import com.google.gson.Gson;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import webservice.Empresa;
import webservice.FachadaException_Exception;
import webservice.Usuario;
import webservice.WebServiceNegocio;
import webservice.WebServiceNegocio_Service;

/**
 *
 * @author Juan Leal
 */
public class ObtenEmpresas extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String json;
            Gson gson = new Gson();

            WebServiceNegocio ws = new WebServiceNegocio_Service().getWebServiceNegocioPort();
            List<Empresa> lst = ws.listarEmpresas();

            // Serializar
            if (lst != null) {
                json = gson.toJson(lst);
            } else {
                json = "[]";
            }

            // Regresa la respuesta
            out.write(json);
        } catch (FachadaException_Exception e) {
            out.append(e.getMessage());
        } catch (Exception e) {
            out.append(e.getMessage());
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
